Automatic shut-off valve.



G. D. MILLER. AUTOMATIC SHUT-OFF VALVE.

APPLIOATION FILED JAN. 22, 1909.

Patented June 8, 1909.

I INVENTOR. M 7 m WgN/ESSFS: I C 5 3 1 ATTORNEY,

iinrrni) STATE-S COSBY ,D. MILLER, OF ST. JOSEPH, MISSOURI.

- AUTOMATIC SHUT-OFF VALVEL Specification of Letters Patent.

Patented June 8, 1909.

Application filed January 22, 1909. serial No. 473,761.

To all whom it may concern:

, Be it known that I, CosBY D. Mrumrf'a C1131Z6T1 of the United States, residing at St. Joseph, in the county of Buchanan and State of Missouri, have invented certain new and useful Im rovements in Automatic Shut-Oi? Valves, 0 which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to improvements in shut-off valves, which are designed to shut off, the flow therethrougli, of gas or liquid under pressure; and the objects of my improvements are, first; to rovide a shut-off valve, which will automatically shut ofi the ilow of gas or liquid, therethrou h, when the pressure of said gas or liquid is lowered to a certain given low pressure, from any cause, and will, thereafter, continually act as a positive shut-oil for said flow, until said valve is manually opened: second; to so construct a shutoii valve, that it shall bepositive in its automatic action, simple in construction, not at all liable to get out of Working order, and be extremely cheap in cost of manufacture. I attain these objects by the mechanism illustrated in the accompanying drawing, in which: I

Figure 1. s a longitudinal section cut vertically through the center of all the parts, Fig.2. is a transshowing the valve. open. verse section, cut vertically through the center of the valve, showing said valve closed, or in shut-oii position.

My invention comprises the diaphragm holder 1, having diaphragm chamber. 1,

formed therein and provided with annular ilan e 1" formed on the outer ed e thereof.

Said diaphragm holder is'also provided with 1 concaved recess 2 formed in the central portion 01' its lower surface and has aperture 3 and port opening 9 through the bottom,

thereof. Valve body 4, has valve chamber 5, formed therein, and the screw threaded inlet opening 6, leading into said valve chamber. Said valve body is also provided with valve opening 7, the outlet chamber 7 and the screw threaded outlet opening, 8, loading from said valvechamber.

in the wall 10 of valve body 4 is the port 9 which connects with aperture 9 and forms communication between outletchamber 7 l and diaphragm chamber 1.

Diaphragm holder 1 and valve body 4 have the outer edge portion of second diaphragm 11 placed between them, and are secured together by cap screws 12, seen in Fig. 2. Said diaphra 111 provides elastic closing means for at a times closing aperture 3, and also provides elastic acking for packing the contacting surfaces 0 said valve ody and diaphragm holder, thereby rendering unnecessary, the machining of said surfaces, and thus cheapening the cost of manufacturing said parts. I

Covering chamber 1 and with its edge resting on flange 1, is the diaphragm 13, on the edge of which rests the annular flange 14. of the diaphragm cover 14, said flanges being secured together by bolts and nuts 15. Said cover has aperture 16 formed therethrough, of ample size to admit eye bolt 17, and to permit free assage of air therethrough. .Under diaphragm 13, is the stem guide 18, guided in aperture 3. Resting on said diaphragm is the operating weight 19,

said weight and stem guide being secured to diaphragm 13, by eye bolt 17, which is screw threaded into said stem guide, at 16.

Valve stem 20 carries valve 21 on its lower end, in valve chamber 5, said valve being adapted to close valve opening 7, as seen in Fig. 2. Said stem is provided with [hinge 20, formed thereon, and with the screw threaded upper portion 20, which is passed 'iipward through the center of s eoiid di=ii ihragni 11 and aperture 2) and is screwed .into the lower portion of stem guide 18,.

thereby securing said valve stem, the central portion of diaphragm 11 and said stein guide together, and forming 1l(X1l)l( closing means For closing aperture 2%, which is absolutely l gasdight, and will not bccoiiio leaky. l'ronl il'reqiient and continuous operation. Both providing loose guiding means, wherein sai stein guide and eycbolt move upward and downward, with perfect freedom. i It will be seen and understood from the foregoing, that apertures 3 and 16, and said i lower portion of stem guide 18 need not the of said diaphragn'is are formed )f such llexisecond diaphragm; a bolt, extending doWn-"' and said semispherical valve are looselv 1 Ward through said aperture in said diagulded. I phragm cover, through said weight, and lntestlmony whereof I afiix my signaturethrough said first mentioned diaphragm, the in the presence of two witnesses. 5 lower end poi tion of said bolt bein secured in said valve'stem securing means, or securing said weight, said first mentioned dia- Witnessest Fhragm and said valve stem together; and C. T. BRYANT, oose guiding means ywhereby said Valve stem S. MOSER.

oosBY D. MILLER. 

